<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item
        @click.native="removePath"
        :to="{ path: '/home' }"
        replace
        >首页</el-breadcrumb-item
      >
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card class="box-card">
      <!-- 添加用户区域 -->
      <el-button type="primary" @click="addDialogVisible = true"
        >添加角色</el-button
      >
      <!-- 角色列表区域 -->
      <el-table :data="roleslist" border stripe>
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1.id)">
                  {{ item1.authName }}</el-tag
                >
                <i class="el-icon-arrow-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <!-- 通过v-for渲染二级权限 -->
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2.id)"
                    >
                      {{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-arrow-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3.id)"
                    >
                      {{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" prop="level">
          <template slot-scope="scope">
            <!-- 编辑按钮 -->
            <el-button
              type="primary"
              icon="el-icon-edit"
              @click="showEditDialog(scope.row.id)"
              >编辑</el-button
            >
            <!-- 删除按钮 -->
            <el-button
              type="danger"
              icon="el-icon-delete"
              @click="removeRoles(scope.row.id)"
              >删除</el-button
            >
            <!-- 分配权限按钮 -->
            <el-tooltip
              effect="dark"
              content="分配权限"
              placement="top"
              :enterable="false"
            >
              <el-button
                type="warning"
                icon="el-icon-setting"
                @click="showSetRightDialog(scope.row)"
                >分配权限</el-button
              >
            </el-tooltip>
          </template>
        </el-table-column>
      </el-table>
      <!-- 分页区域 -->
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog
      title="添加角色"
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form :model="addForm" label-width="80px" ref="addFormRef">
        <el-form-item label="角色名称">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改用户的对话框 -->
    <el-dialog
      title="修改角色信息"
      :visible.sync="editDialogVisible"
      width="40%"
      @close="editDialogClosed"
    >
      <!-- 内容主体区域 -->
      <el-form :model="editForm" label-width="80px" ref="editFormRef">
        <el-form-item label="角色名称">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editRole">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%"
      @close="choseSetRightDialog"
    >
      <el-tree
        :data="rightslist"
        :props="treeProps"
        node-key="id"
        show-checkbox
        default-expand-all
        :default-checked-keys="defkeys"
        ref="treeRef"
      ></el-tree>
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 角色列表数据
      roleslist: [],
      // 所有权限的数据
      rightslist: [],
      // 控制修改用户对话框的显示和隐藏
      editDialogVisible: false,
      // 控制分配权限对话框的显示和隐藏
      setRightDialogVisible: false,
      // 控制添加角色对话框的显示和隐藏
      addDialogVisible: false,
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 树形控件打开时选中角色已有的权限项
      defkeys: [],
      // 角色id
      roleId: '',
      // 查询当前修改用户的信息
      editForm: {
        roleId: '',
        roleName: '',
        roleDesc: ''
      },
      // 添加新角色的信息
      addForm: {
        roleName: '',
        roleDesc: ''
      }
    }
  },
  created() {
    this.getRoleslist()
  },
  methods: {
    async getRoleslist() {
      const { data: res } = await this.$http.get('roles')
      if (res.meta.status !== 200)
        return this.$message.error('获取角色列表数据失败')
      this.roleslist = res.data
      console.log(res.data)
    },

    // 监听修改角色的关闭事件
    editDialogClosed() {
      //   this.$refs.editFormRef.resetFields()
    },
    // 根据Id删除对应的权限
    async removeRightById(role, rightId) {
      // 弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        '此操作将永久删除该文件, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('取消了删除!')
      }

      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId}`
      )

      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败!')
      }
      this.$message.success('删除权限成功!')
      // 重新渲染数据
      role.children = res.data
    },

    // 显示分配权限对话框
    async showSetRightDialog(role) {
      // 获取所有权限的数据
      const { data: res } = await this.$http.get('rights/tree')
      // 获取角色id
      this.roleId = role.id
      if (res.meta.status !== 200) {
        return this.$message.error('获取所有权限数据失败!')
      }

      this.$message.success('获取所有权限数据成功!')

      this.rightslist = res.data
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defkeys)
      this.setRightDialogVisible = true
    },
    // 点击按钮,显示修改用户信息对话框
    async showEditDialog(id) {
      const { data: res } = await this.$http.get('roles/' + id)
      if (res.meta.status !== 200)
        return this.$message.error('查询用户信息失败')
      this.editForm = res.data
      this.editDialogVisible = true
    },
    // 点击按钮,提交修改角色信息
    async editRole() {
      // 可以发起真正的网络请求
      const { data: res } = await this.$http.put(
        'roles/' + this.editForm.roleId,
        {
          roleName: this.editForm.roleName,
          roleDesc: this.editForm.roleDesc
        }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('修改角色信息失败!')
      }
      this.$message.success('修改角色信息成功!')
      this.editDialogVisible = false
      this.getRoleslist()
    },
    // 关闭分配权限对话框
    choseSetRightDialog() {
      this.defkeys = []
    },
    // 通过递归的方式,获取角色下所有三级权限的id,并保存在defkeys中
    getLeafKeys(node, arr) {
      // 如果node节点没有包含children属性,则node为三级节点
      if (!node.children) {
        return arr.push(node.id)
      }

      node.children.forEach(item => {
        this.getLeafKeys(item, arr)
      })
    },
    // 点击确定为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(
        `roles/${this.roleId}/rights`,
        { rids: idStr }
      )
      if (res.meta.status !== 200) {
        return this.$message.error('更新权限失败!')
      }
      this.$message.success('更新权限成功!')
      this.getRoleslist()
      this.setRightDialogVisible = false
    },
    // 删除角色
    async removeRoles(id) {
      // 弹出对话框
      const confirmResult = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)

      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(`roles/${id}`)
      if (res.meta.status !== 200) {
        return this.$message.info('删除角色失败!')
      }
      this.$message.success('删除角色成功!')
      this.getRoleslist()
    },
    // 添加角色
    async addRole() {
      const { data: res } = await this.$http.post('roles', {
        roleName: this.addForm.roleName,
        roleDesc: this.addForm.roleDesc
      })
      if (res.meta.status !== 201) {
        return this.$message.error('添加角色失败!')
      }
      this.$message.success('添加角色成功!')
      this.getRoleslist()
      this.addDialogVisible = false
    },
    //  监听添加角色对话框的关闭事件
    addDialogClosed() {
      this.$refs.addFormRef.resetFields()
    }
  }
}
</script>

<style lang="less" scoped>
.bdtop {
  border-top: 1px solid #eee;
}

.bdbottom {
  border-bottom: 1px solid #eee;
}

.vcenter {
  display: flex;
  align-items: center;
}
</style>
